This 2006 image provided by NASA shows an image of Uranus with its moon Ariel, small white sphere, made by the Hubble Space Telescope. A team of Canadian and French scientists discovered a space rock that closely follows the planet’s orbit. The discovery was published in the Friday, Aug. 30, 2013 issue of the journal Science. Some 6,000 space rocks are known to follow Jupiter, the most of any planet. Earth shares its orbit with a tiny asteroid. (AP Photo/NASA)

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